Earlier period

Ok so my period is supposed to start on the 11th and end on the 18th, according to eve. Problem is, I’m not very regular (usually early) and I have my first gynecologist appointment on the 19th (I told my mom anytime not between 8-20 but she did that anyways 🙄🤦‍♀️) I’m 16 btw. Well my last period was right on time and lasted 9 days, so I’m a little worried about this one.

My periods are usually light the first day, heavy the next two, and then practically nothing the rest but it lasts so long! I’m wondering if there’s any way to make my period come as early as possible or maybe end earlier? Help is appreciated thanks 😊